condition mean min max ZT0-3 0.0517916885 0.0 0.103583377 ZT4-7 0.0 0.0 0.0 ZT8-11 0.022546410500000003 0.0 0.045092821000000005 ZT12-15 0.13743939666666666 0.0 0.2748787933333333 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0328174475 0.0 0.065634895